Reza Ahmadian, a professor of Biochemistry and molecular biology at the Heinrich Heine University, Düsseldorf, works on the molecular mechanisms of disease-related signaling pathways by (i) purifying and identifying native RAS protein complexes in cell-specific contexts and subcellular sites, (ii) elucidating the structure–function relationships of protein–protein and protein–ligand interactions, (iii) characterizing and in vitro reconstituting signaling networks in solution and on synthetic liposomes, and (iv) identifying and validating new interacting surfaces as potential drug target sites.